function initNav() {
	var _nav = document.getElementById("nav");
	if (_nav) {
		var lis = _nav.getElementsByTagName("li");
		for (i = 0; i < lis.length; i++)
		{
			var liss = lis[i].parentNode.getElementsByTagName("li");
			for(j = 0; j < liss.length; j++)
			{
				if (lis[i].parentNode == liss[j].parentNode)
				{
					if ((liss[j].className.indexOf("active") != -1))
					{
						if (lis[i]._active)
						{
							lis[i]._active.className = lis[i]._active.className.replace("active", "");
						}
						lis[i]._active = liss[j];
					}
				}
			}
			lis[i].onmouseover = function() {
				if (this._active) {
					this._active.className = this._active.className.replace("active", "");
				}
				if (this.className.indexOf("active") == -1)
				{
					this.className += " active";
				}
			}
			lis[i].onmouseout = function() {
					this.className = this.className.replace("active", "");
					if (this._active) {
						if (this._active.className.indexOf("active") == -1) {
							this._active.className += " active";
						}
					}
			}
		}
	}
}

if (window.addEventListener){
	window.addEventListener("load", initNav, false);
}
else if (window.attachEvent){
	window.attachEvent("onload", initNav);
}